二氧化碲(TeO2)晶体是一种具有高品质因数的声光材料,有良好的双折射和旋光性能,用TeO2单晶制做的声光器件的分辨率可有数量级的提高,响应速度快,驱动功率小,衍射效率高,性能稳定可靠等优点。TeO2晶体具有良好的声光性能,是制做声光偏转器、调制器、谐振器、滤波器的理想材料。
TeO2晶体的性能参数
Crystal class | Tetragonal |
Refractive index | ηo=2.81 ηe=2.32 |
Transitivity | >70% at 632.8nm |
Thermal expansion at 293K,1/k Parallel to <110> Parallel to <001> | 19.5×10-6 6.10×10-6 |
Acoustic velocities, km/sec For shear wave along <110> For shear wave along <001> | 0.617 4.26 |
AO figures of merit M1, cm2,sec/g(shear/longitudinal) M2, cm2,sec/g(shear/longitudinal) | (68.6/142)×10-7 (1200/34.5)×10-18 |